Abstract
Results of the direct current (DC) Electrical Conductivity, thermoelectric power and Electron Spin Resonance (ESR) of CdO substituted PbO-V2O5 glass system are reported. Conduction in these glasses is found to be electronic and the hoping of polaron seems to be the dominant process in the transport mechanism. There is a remarkable decrease in the activation energy for conduction in the annealed and devitrified samples when compared to their amorphous counter parts. It is observed that there is remarkable improvement in the conductivity of the crystalline samples when compared to their amorphous counter parts. The thermoelectric power measurements indicates that the amorphous samples are n-type at room temperature where as the crystalline samples are p-type at room temperature. In crystalline samples the hyperfine structure is nearly smeared out and a relatively broad line with an isotropic g value characterizes the spectra.
Highlights
The PbO-V2O5 glass system has been extensively studied and the crystal structure of PbV2O6 or PbV2O7 Phases are known [1,2]
There is a remarkable decrease in the activation energy for conduction in the annealed and devitrified samples when compared to their amorphous counter parts
The thermoelectric power measurements indicates that the amorphous samples are n-type at room temperature where as the crystalline samples are p-type at room temperature
Summary
The PbO-V2O5 glass system has been extensively studied and the crystal structure of PbV2O6 or PbV2O7 Phases are known [1,2]. Results of the direct current (DC) Electrical Conductivity, thermoelectric power and Electron Spin Resonance (ESR) of CdO substituted PbO-V2O5 glass system are reported. In the present paper we reported the results of DC Electrical Conductivity, thermoelectric power and ESR studies of CdO substituted lead Vanadate glass systems in the crystalline form compared with glass form in the range of 0 to 15 mole%.
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